{"id":20,"date":"2017-06-14T09:09:52","date_gmt":"2017-06-14T09:09:52","guid":{"rendered":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/?page_id=20"},"modified":"2017-06-16T10:44:25","modified_gmt":"2017-06-16T10:44:25","slug":"traitement-des-images-et-securite","status":"publish","type":"page","link":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/?page_id=20","title":{"rendered":"Utilisation des techniques de traitement et d\u2019analyse d\u2019images pour la s\u00e9curisation des documents hybrides"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/l3i.univ-larochelle.fr\/IMG\/arton655.jpg?1392210087\" width=\"170\" height=\"219\" \/><\/p>\n<p><a href=\"https:\/\/l3i.univ-larochelle.fr\/Gomez-Kramer-Petra-MCF\">Petra Gomez-Kr\u00e4mer<\/a>, <a href=\"https:\/\/l3i.univ-larochelle.fr\/?lang=fr\">laboratoire informatique, image et interaction<\/a>, <a href=\"https:\/\/www.univ-larochelle.fr\/\">universit\u00e9 de La Rochelle<\/a><\/p>\n<p>Un document hybride est un document pouvant \u00eatre sous forme num\u00e9rique et sous forme papier d\u00fb \u00e0 des impressions et\/ou num\u00e9risations du document original.<\/p>\n<p>En cons\u00e9quence, des diff\u00e9rentes versions d\u00e9grad\u00e9es d\u2019un document apparaissent, comme par exemple l\u2019original num\u00e9rique, sa version imprim\u00e9e, ainsi que sa version imprim\u00e9e et num\u00e9ris\u00e9e.<\/p>\n<p>Ind\u00e9pendamment de sa forme, le document doit \u00eatre authentifi\u00e9 pour pr\u00e9venir la fraude. A cause des diverses d\u00e9gradations provenant du processus d\u2019impression et de num\u00e9risation, un hachage cryptographique ne peut pas \u00eatre appliqu\u00e9 pour authentifier le document. Par contre, les algorithmes de traitement et d\u2019analyse d\u2019images de document peuvent \u00eatre utilis\u00e9s pour extraire le contenu visuellement significatif (le texte, les logos, les signatures manuscrites et la mise en page). Ce contenu peut ensuite \u00eatre hach\u00e9 afin de produire un code de hachage qui est identique pour toutes les versions du document.<\/p>\n<p>Cette conf\u00e9rence introduit les principales m\u00e9thodes de traitement et d\u2019analyse d\u2019images de document, explique leurs difficult\u00e9s vis-\u00e0-vis des diverses d\u00e9gradations caus\u00e9es par le processus d\u2019impression et de num\u00e9risation et pr\u00e9sente les avanc\u00e9es r\u00e9centes pour l\u2019authentification des documents hybrides.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Petra Gomez-Kr\u00e4mer, laboratoire informatique, image et interaction, universit\u00e9 de La Rochelle Un document hybride est un document pouvant \u00eatre sous forme num\u00e9rique et sous forme papier d\u00fb \u00e0 des impressions et\/ou num\u00e9risations du document original. En cons\u00e9quence, des diff\u00e9rentes versions d\u00e9grad\u00e9es d\u2019un document apparaissent, comme par exemple l\u2019original num\u00e9rique, sa version imprim\u00e9e, ainsi que sa [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-20","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/index.php?rest_route=\/wp\/v2\/pages\/20","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20"}],"version-history":[{"count":3,"href":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/index.php?rest_route=\/wp\/v2\/pages\/20\/revisions"}],"predecessor-version":[{"id":50,"href":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/index.php?rest_route=\/wp\/v2\/pages\/20\/revisions\/50"}],"wp:attachment":[{"href":"https:\/\/projects.lsv.ens-paris-saclay.fr\/confsrentree\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}